fix(chat): apply unlocked voice audio url

src/stores/chat/__tests__/chat-machine.helpers.test.ts

@@ -66,8 +66,7 @@ describe("sendResponseToUiMessage", () => {
   it("maps locked voice messages without treating them as private text", () => {
     const message = sendResponseToUiMessage(
       makeResponse({
-        audioUrl:
-          "https://proapi.banlv-ai.com/audio/5198b93c-2915-406a.mp3",
+        audioUrl: "",
         lockDetail: {
           locked: true,
           showContent: false,
@@ -80,9 +79,7 @@ describe("sendResponseToUiMessage", () => {
     );
 
     expect(message.content).toBe("AI reply");
-    expect(message.audioUrl).toBe(
-      "https://proapi.banlv-ai.com/audio/5198b93c-2915-406a.mp3",
-    );
+    expect(message.audioUrl).toBeUndefined();
     expect(message.locked).toBe(true);
     expect(message.lockReason).toBe("voice_message");
     expect(message.lockedPrivate).toBeUndefined();
@@ -243,7 +240,7 @@ describe("localMessagesToUi", () => {
         type: "voice",
         content: "hidden voice transcript",
         createdAt: "2026-06-25T12:00:00.000Z",
-        audioUrl: "https://example.com/voice.mp3",
+        audioUrl: null,
         image: { type: null, url: null },
         lockDetail: {
           locked: true,
@@ -257,7 +254,7 @@ describe("localMessagesToUi", () => {
     ]);
 
     expect(message.content).toBe("hidden voice transcript");
-    expect(message.audioUrl).toBe("https://example.com/voice.mp3");
+    expect(message.audioUrl).toBeUndefined();
     expect(message.locked).toBe(true);
     expect(message.lockReason).toBe("voice_message");
     expect(message.lockedPrivate).toBeUndefined();

src/stores/chat/__tests__/chat-machine.transitions.test.ts

@@ -59,6 +59,7 @@ function makeUnlockPrivateResponse(
   return UnlockPrivateResponse.from({
     unlocked: true,
     content: "unlocked content",
+    audioUrl: "",
     reason: "ok",
     creditBalance: 90,
     creditsCharged: 10,
@@ -740,7 +741,7 @@ describe("chatMachine transitions", () => {
     actor.stop();
   });
 
-  it("keeps voice message content unchanged after unlock succeeds", async () => {
+  it("applies the real voice audio url after unlock succeeds", async () => {
     const actor = createActor(
       createTestChatMachine({
         historyMessages: [
@@ -749,7 +750,6 @@ describe("chatMachine transitions", () => {
             content: "Original voice transcript.",
             isFromAI: true,
             date: "2026-06-29",
-            audioUrl: "https://example.com/voice.mp3",
             locked: true,
             lockReason: "voice_message",
             privateMessageHint: "A voice message is waiting.",
@@ -759,6 +759,7 @@ describe("chatMachine transitions", () => {
           messageId: "msg-voice-locked",
           response: makeUnlockPrivateResponse({
             content: "This response content must be ignored.",
+            audioUrl: "https://example.com/unlocked-voice.mp3",
           }),
         },
       }),
@@ -783,7 +784,7 @@ describe("chatMachine transitions", () => {
       {
         id: "msg-voice-locked",
         content: "Original voice transcript.",
-        audioUrl: "https://example.com/voice.mp3",
+        audioUrl: "https://example.com/unlocked-voice.mp3",
         locked: false,
         lockReason: null,
         privateMessageHint: null,
@@ -802,7 +803,6 @@ describe("chatMachine transitions", () => {
             content: "",
             isFromAI: true,
             date: "2026-06-29",
-            audioUrl: "https://example.com/voice.mp3",
             locked: true,
             lockReason: "voice_message",
             privateMessageHint: "A voice message is waiting.",
@@ -855,6 +855,14 @@ describe("chatMachine transitions", () => {
       requiredCredits: 10,
       shortfallCredits: 7,
     });
+    expect(actor.getSnapshot().context.messages).toMatchObject([
+      {
+        id: "msg-voice-locked",
+        locked: true,
+        lockReason: "voice_message",
+      },
+    ]);
+    expect(actor.getSnapshot().context.messages[0]?.audioUrl).toBeUndefined();
     expect(actor.getSnapshot().context.isUnlockingMessage).toBe(false);
 
     actor.stop();

src/stores/chat/chat-unlock-flow.ts

@@ -64,7 +64,11 @@ export const unlockMessageActor = fromPromise<
   if (unlockResult.data.unlocked) {
     const markResult = await chatRepo.markPrivateMessageUnlockedInLocal(
       input.messageId,
-      unlockResult.data.lockDetail,
+      {
+        content: unlockResult.data.content,
+        audioUrl: unlockResult.data.audioUrl,
+        lockDetail: unlockResult.data.lockDetail,
+      },
     );
     if (Result.isErr(markResult)) {
       log.warn("[chat-machine] mark unlocked local message failed", {

src/stores/chat/chat-unlock-helpers.ts

@@ -20,6 +20,7 @@ export function applySingleUnlockOutput(
 
     return {
       ...message,
+      audioUrl: getUnlockedAudioUrl(message, output.response),
       locked: output.response.lockDetail.locked,
       lockReason: output.response.lockDetail.reason,
       imagePaywalled: message.imageUrl
@@ -32,6 +33,15 @@ export function applySingleUnlockOutput(
   });
 }
 
+function getUnlockedAudioUrl(
+  message: UiMessage,
+  response: UnlockPrivateResponse,
+): string | undefined {
+  if (message.lockReason !== "voice_message") return message.audioUrl;
+  if (response.audioUrl.length === 0) return message.audioUrl;
+  return response.audioUrl;
+}
+
 function shouldApplySingleUnlock(message: UiMessage, messageId: string): boolean {
   if (message.id !== messageId) return false;
   if (!message.isFromAI) return false;